125HP Go Kart Hits the Drag Strip! 90+ MPH, Test n' Tune, Full Send!!
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- Опубліковано 7 вер 2024
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Our 670cc 2 stroke go kart is one fast go kart. In today's episode of CarsandCameras, we take our 125HP go kart to the drag strip. It's safe to say that we built a 100mph go kart. This snowmobile powered go kart outperformed our wildest expectations, and with a little bit more tuning to the carburetors, fuel delivery, and gearing, this go kart could go over 100mph in the 1/8th mile.
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As a snowmobile guy I have to suggest rebuilding your clutches. New springs and weights and give them a good cleaning. Also check your jetting snowmobiles are jetted for cold weather from factory so I'm going to guess your running it very fat...just some suggestions. Last but not least this video and that cart are awsome!
I second this. The clutches are binding clearly from the video. I would also recommend a freer flowing silencer- don’t run without it!
Tighten driven clutch, shifting too fast
I suggest putting the exhaust back on tight. It started blogging because the exhaust came loose after the first run. Removing it all together made it even worse. These small engines need backpressure to perform at peak power on the low end. Otherwise, the mixture expells early producing a cold burn. Ike pulling its exhaust off was a mistake, he should have tightened it back up. This is what happens when you play a guessing game rather than try to learn about tuning. No excuse with all the tuning knowledge all around youtube by pros. They need to drop their egos and learn from others including their subscriber's comments. They have no idea how to tune a carb.
@@FarmerFpv I was completely on board with you until the second half of your comment. Ike made a call on the fly based on the knowledge he had. He was wrong, so what? Do you seriously have the expectation that everyone should be an expert before even attempting anything, just because the knowledge is available? You, my friend, are the one who needs to check his ego
@@limprooster3253 this^, you tell him
I think the drag rail needs something like this engine in it, possibly with a manual clutch so you can get the revs up before you leave.
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Or better brakes on the axle to get it up in the reg range and get it set
No manual clutch needed, snowmobiles are already the fastest accelerating land vehicle. Heavier primary spring.
@@police428 that only works in an automatic car, do that with a CVT and you'll demolish the belt instantly
You need a higher stall spring on the primary clutch it should engage at 5200 RPM for a good race take off Factory is about 43 to 4500 RPM
*TIP* if you increase the flow OUT of the tank, you also have to increase the VENT size into the tank.
Pretty sure that's why Ike unscrewed the fuel cap when John ran...but truth is they ran out of gas anyway. But yes I agree with you about venting
When you decelerate at end of track, don't engine brake the whole way. Blip the throttle now and then to lube the pistons.
specially with 2 stroke!
Good advice, though depending on the setup a CVT may not engine brake much at all. In this case it sounded to me like it was dropping to idle so it'd just be freewheeling.
It's a CVT clutch it drops back to idle soon as you lift unlike a motor with a pressured clutch like a motorcycle or car.
CVT clutches do engine brake. Most the atv and sxs CVT clutches do.
@@g_compo8639 It really depends how it is set.. CVT can stick until low speed on the rear axle..
"I heard some tire squealing." No, that was just John.
He was about to pee his pants...you can see his foot lifting
@@bolambert6457 🤦
I'm dead 🤣🤣 and so was John's mom for a few seconds after watching this
Snowmobile engines are tuned for cold weather. You'll probably need to jet the carbs up for warmer temps.
They are set up to run a bit Richer for cold winter weather. Cold air is much denser thus you need more fuel. Ya Don't want to lean it out and have it go super lean mid run and burn it up. True a lean engine is a faster engine but you produce alot of heat. Good way to burn holes through the top of pistons.
It will be fine. Just put slightly hotter plugs in it to help prevent plug fouling.
We run drag atvs w snowmobile motors in them in 100 degree heat. Youbare correct It isnt even close to stock jetting!!
That’s awesome!! Still dosent sound like it is reving out all the way. You will have to do some clutch work, lighter weights, and lean it out just a bit. One jet size. Run 91 octane with a 40:1 mix. Try that!!
My thoughts too on the jet size. Also plug temp one range up? Bosch plugs!!!!
The stumble on low RPM at WFO is a fat mixture. Lean her out! That’ll get you some higher RPMs too.
Oil mixture for that engine is 50:1, grew up on sleds and had that engine. Jetting and the hotter plug will help. Also, those engines don’t like getting hot, pushing it like that you need more of a cool down between runs.
50:1 klotz r50 is what that engine works best on. I promise
@@cr500_conversions Back in the day we ran "golden spectro" synthetic. Ya I was thinking it was smoking a bit too much.
You guys literally have a land rocketship from what i can tell, just from the first run that John did reaching up to 95 MPH on the speed. Which is highly impressive.
That’s about 25mph less then when that motor was in a snowmobile.
@@rydplrs71 I’d say it’s about what it would actually do on radar. Speedo speed would probably do almost 120. But yes there definitely is a long more room for improvement on this kart, should easily do well over 100 on a drag strip but like they said it gets real sketchy.
@@beatersnbeers2145 Taller gearing for sure
@@beatersnbeers2145 who believes a Speedo? I’ve ridden probably 30 different sleds past radar, or calibrated timing lights at distances from 1000’ to 1.25 miles. The sled that engine was in with nothing more then gearing or clutch work could easily run 120mph on 1/8th mile asphalt.
125 HP should give 140 MPH on full 1/4 mile strip...
Now the MAIN & ONLY reason why this cart can't beat
Bugatti Veyron in drag race is excessive weight of it's pilot's iron balls!
😂😂😂
🤣🤣🤣🤣
I love how this channel has evolved with projects but still keeps it real with character. Seeing you three laugh hard, work hard, and come up with wild ideas us viewers only dream up at work during a boring meeting…always has me coming back to find out what y’all are up to.
I can’t wait for the next video!!😱 I really want to see the Dukarty and the 670 go head to head!! Literally you guys have the best go kart channel! You guys are awesome!! Keep it up 👍
After this vid everybody is gonna want a drag rail revival or maybe even a new dragster build! I'm down for both!
That’s awesome guys! I think you guys should go for a detailed setup on this kart. Tuned pipe & jetting and maybe play with the clutching weights etc. Basically make it as good as it can be with a stock engine.
The bog is the fuel sloshing backwards in the tank, away from the pickup point. Move the fitting to the rear of the tank.
Should increase flow also with the extra pressure from the push....
I think you're right. I also think they've got an issue with their CVT keeping it bogged. But the sputtering right off launch I'm almost certain is the fuel sloshing around. Hence why it ran better on the first pass
I definitely want to see you get everything ironed out and make a run without any issues! Really impressive! 👍 🤩
Good job guys. Low 7s is really really good. When you get it dialed In you got yourself a 10sec gokart in the 1/4
That's an 11 second quarter mile pass boys!
Well done!
Isaac had a pretty decent 60 & 1/8th mile time on the first couple..thing is going to be wicked once the jetting and CVT is all dialed in.
You guys should play with the secondary spring position/tension. It will change your gearing without changing physical gearing.
Your best launches will be had by revving until just below your engagement rpm and then pinning it from there, using the brake to obviously hold you back. Good times guys👍
Primary clutch has more to do with launch than secondary.
However I agree the sec has to be right too and sheaves shift out smoothly and fully
C&C is becoming a lot bigger and better produced every episode.
You are really growing in fab-skills, driving skills, course-making, video editing, sponsors, the new shop.
Big growth, good work!
I got chills when you said you’re bringing back the Ducarti!! This is gonna be EPIC…and sketch but it’ll be fine!
I'd like to see you guys take the miata engine and build a mini sand rail with it. Like the dune buggies with the big blocks that do wheelies. But a mini version. 🔥
Nice hood ornament on the Miata. Awesome footage of nighttime track racing. Amazing build, 95 mph on it's first wide open test, I can't wait to see once the bugs are worked out. Thanks guys, LOVE the channel.
After watching this,reading all the comments,(Yes,I'm 'that guy')I suggest taking the clutches apart and clean them,Lighten the front weights so they launch at a higher rev.,and put slightly taller tires on.The dang frames dragging at flex.Look under it at the flat ground tubes.That'll raise the ratio a bit too.Build yourselves a slightly smaller muffler but without baffles.You need the back pressure.Rock on guys!
Love the video guys, can’t wait to see what you guys are gonna do with the ducarti. The ultimate 4 vs 2 stroke showdown!
Slowly but surely getting this dialed in guys, experimenting with different weights and springs in the clutches is the best way to get it dialed perfect along with jetting. I know you will get it figured out it just takes some time.
LMAO! so funny hearing John as he drives!
I love it! Lord please watch over these boys and return them to 0mph safely every time.
The 670 and Ducarti both deserve to be "polished" Fix any bugs, sketchy parts, etc. You guys built a couple awesome machines! Can't wait for the air strip vid!
Gonna be a juicy matchup! The 2-stroke is really cool and it goes LIKE STINK once it steams up. That said, I remember the Ducati engine rescue from Issac's old place of business and the thrash to make it work on the kart so it has a rent-free spot in my heart. The Ducarti is angry, violent and makes ALL the right noises. Something strange how I love a purpose built machine that just wants to hurt you. Team Ducarti.
That’s why it bogged “Ain’t got no gas in it”. Love these guys friendship!!
The clutching/gearing might be causing your lower end bog. It's possible the belt is wrong or wore out. Also I can't remember if you guys are using the snowmobile clutches on that or not but if so make sure top of belt is level with the secondary clutch pulley with engine off or at idle. And the secondary clutch on a snowmobile has adjustments. But seems like when trying to do full throttle take off belt is initially pulled into the clutches to much which is like trying to take off in 4th or 5 gear then engine catches up eventually. after Ike's 1st pass the belt was stretched or your motor moved making belt loose. If you do any carburetor jetting write down what you take out so can always come back to it but I would start with clutching. The snowmobile that engine came out of can get too 100 or 120 so that cart has some power left on the table
Congrats on 1 million subscribers!!
Just noticed, much deserved and lots of good times had with you guys👍🏼
Currently thinking of some of the first carts builds just swapping predators on frames and sending them up and down the street a few times, or off-roading on that little trail you guys had by the house
Something to look into if you haven't already. I run a Lincoln 210 MP at work and it can use 120v or 220v. It came with two plugs. I like having the ability to switch from solid to flux core to stick or tig with it. Really nice machine. Also, great videos guys.
As someone who's from the north where the snowmobiles roam (in the winter) I would suggest checking your engines crank seals, base & head gaskets and any other thing that looks like a gasket to make sure it's not sucking air from somewhere. Usually when it's sucking air it'll cause a run-lean issue that makes tuning your carburetors nearly impossible. The last thing you want is that thing locking up on you doing 95mph because it was sucking air.
As for which kart will win in the next video, I'll vote for the 670-Kart as I'm a fan of 2-strokes more. They're best at making the most power in a lighter weight and smaller displacement than a 4-stroke even if they're not good with making torque. :)
That's an insane speed on that thing!! Most I've done on the track is 126mph, but that's on a Diavel lol.
He'll yeah brother that thing will do over 100mph definitely in the mid 6's that bog as soon as you leave is killing your time up to maybe 2 seconds but the right exhaust for that motor even aftermarket that thing has enough balls to put u in the high 5's and a bigger tank taller gears
See you on the big end
Way to go guys, 7.2 @ 90mph in the 1/8 mile...on a go-cart!! Can't wait to see what it does against the Ducarte after you work the bugs out!
I've suggested you put a snowmobile engine in the drag rail a few times, now. Growing up riding snowmobiles, I know how quick those engines can be. Even on snow, they move out. This is gratifying to see. Thanks!
I usually shake my head when John says something Is fast and gets scared but I believe it this time. Awesome.
I think if yall are gonna be doing drag stuff with it get the head ported and find a set of drag pipes and make it just an absolute beast in the 1/8th
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Wow, that kart is fast! With some tuning, it's gonna be insane!
yeah you get that fuel delivery figured out and this thing is easily in the 6's at 95-100 easy. it sounds like a monster once it clears up and catches
Thank you guys. Awesome content as always. Super excited to see the head to head footage with the Ducarti
This Vs. The Dukartti Vs. Rather B Welding's Snowmobile Kart
ULTIMATE CONTENT!!
That's one fast machine!!🏁
That was Epic, Considering what it is and John's reaction is priceless
Very cool! Just keep dialing it in and see how fast you can get her going!✊😁
Everyone's running high power cars around 400+ HP? (I dunno)
And you see a tiny go kart with a snowmobile getting ready behind a drag car
You don't see that everyday which is why I love it
Two strokes munch spark plugs, I don't know why . Try replacing the plugs when it starts bogging. Also if you're running spark plugs for a snowmobile you might want to go up a number or two as the engine will run a little hotter and kill plugs. Higher rating equals longevity. Also get some old race pipes on there if you really want to be impressed. I love two strokes. Great work dudes. Also leave that air filter on!
Hell yeah brother! Get the gearing right and you're in the 6s.
That must have felt bloody fast sitting on the ground!!
When you get all the bugs worked out of that thing it’s going to be a rocket ship water monster can’t wait to see the Ducati in this battle it out great video though guys👍🏼🤩💪🏼
Please continue on this project, id love to see more drag racing on this channel! Was so sad when the drag rail was put away long ago from busco accident!
that thing runs a 1/8th mile time like a 600cc sports bike. Awesome work guys
95 in the 8th is effing respectable 🤩
WTG😁👍👍
Lol, that little forklift pits perfectly in the garage. It was meant to be!
You guys need to nut and bolt these things between runs. As you've seen things loosen up, and there are a lot more crucial things than the silencer. I'm hoping for a double length episode on this show down. You need to tune them both. Top speed runs, maybe a slalom run, burn out, and donut competitions, then culminate in a head to head drag race.
Looks like fun 👍🏻 My sled powered buggy had the same bog until I fattened up the low/intermediate jet
Cars and Camras y'all rock! Love the channel and content! I'm here for the algorithm! Peace
Hi Guys, great to see this project perform at the strip, I think this one could go a long way.. Aside from the obvious stuff like checking the carbs are clean after running out of fuel, I think the previous comments about using a heavier clutch spring to increase the stall speed is a great idea, 2 strokes make most of their power at higher rpm .. they are prone to bogging at low rpm's .. also as mentioned increasing the stall will allow you to blip throttle more on de-cell and pump more fuel/oil mix into the engine .. never a bad thing IMHO.
From the video, it looks like you ran those passes almost back to back? which makes me wonder about coolant temps?
Someone also mentioned running junior dragster slicks, I think this would help a huge amount and stop any spinning as well as reduce balance issues, remember small tyres turn a lot faster than large diameter ones ... and those little go-cart wheels almost certainly aren't rated for 90mph :)
This kart is truly bonkers. What’s your ET prediction once we get it dialed?
This is going to be awesome but it would have been so really awesome like if it would have been live
Yall should build a cyclekart!
Next time please cool it down between passes,and,if you foot break it,it would pick up a whole second
You should be able to get it into the mid 6’s, at least. Considering the power and weight, as well as traction, that’s what I see it doing with some fine tuning.
Maybe the sloths from the gas tank? Or maybe it's getting way too much gas on take off
Hey guys Minnesotan here, as a northerner I got some advice. You should jet your fuel mixture leaner due to your intake and exhaust system and because cold air is more dense. Check your belt too because a worn belt robs a lot of power. Then check your clutches and clean them and make sure they are not showing serious signs of wear. Also I think that is a ski doo TRA clutch which means you should be able to adjust the engagement speed, for drag racing,higher engagement speed is better due to it hitting the power band, which is around 6000 rpm’s. Speaking of power band check your RAVE valves, they make a HUGE difference in how those motors preform. Hope this helps
Love it! I do not know how you have the fuel feed from the tank setup but is it possible that during acceleration, fuel is sloshing away from the pickup tube and ultimately starving it of fuel? Just a thought. 95 mph is impressive!
That thing is insane!!!! Keep it up guys
That kart is so fast!! The first pass was incredible
I'm so exited for the ducarti man can't wait
Super killer videos guys,now it’s just about summer time let’s use the tracks and go killer places and rip it up fellas!
Piedmont Dragway is great!!!
They also host drift events, and y'all have that Miata. . .
Well now, you've finally got some real info on one of your projects and I'm LOV'IN it. But I think top speed would be your best gage for run comparison because the timing seems to be very confusing when a slower Top Speed can do a lower timed time. Can't wait to see this machine run again after the mods and repairs have been done. A-1 video
Wicked fast , great job guys ! You definitely need to do clutch maintenance, and set up your carburetors before more troubleshooting , there are many plastic wear parts and points in those clutches that can cause binding and bogging from a dead stop . Also if the carburetors have been swapped from side to side that can cause issues as the are jetted differently on the mag and clutch sides . They also should be synchronized to ensure they are opening at the same rate , and fuel float levels should be adjusted to ensure proper atomization. Please don't take off the exhaust muffler as this can seriously lean the engine and cause damage , it is tuned to create the optimal backpressure to keep the fuel in the engine as the piston is closing , lastly clean the exhaust valves and check for leaks/ tears in the diaphragms . All of these items need to be addressed before any troubleshooting I cannot stress this enough , these are fine tuned engines and are very sensitive to the above parameters . 👍 Hope to see it in the mid 6's 👍
Please download the Skidoo Race Team manual for that year of engine , it has all the info needed to make that engine absolutely rip , it's all laid out complete with pictures , measurements , factory specs , and even has carb jetting charts for altitude/ temperature.
It probably needs an electric fuel pump!! Gearing and fresh tires.... The dukarty vs. this will be a great race. It needs a front bash bar! I can't wait; it's about to get awesome
Yep, when a 2-stroke is "running properly" they make a lot of power, for there displacement size and weight.
I guess the replacement for displacement is simply removing valves & cams 😂
AWESOME!!!! I absolutely CANNOT wait for the next vid
The difference may be that Johns burn-outs were done inside the wet box.. Ike's was done outside the box. Makes me wonder how fast this rocket would go with a set of Hooser 18" x 8" rear Jr. Dragster slicks on it...
John, try rolling thru the water till the End of the water, hold the brake, mat the gas and then let of the brake.
@@kcav5374 Thank you.That was driving me nuts.
That would drastically increase the gear ratio and slow down acceleration but the top speed would be higher.
@@rhull3939 The cart will gain more on top end than it would lose on the line.. and that's the whole point.
@@BobbyOfEarth it won't. For 1/8 mile drag racing you want the best acceleration of the line. That results in the best times. That's why 60 ft times are so important to drag racers. It would for sure have a slower time in the 8th with taller tires although it would have probably a higher trap speed. For example, John had a way slower time than Isaac even though he went 6 mph faster because his start sucked.
Hell Yeah Brother, AIRSTRIP , DAMM that's gonna be awesome hardly freaking wait for that video, once you sort the fuel issue and get rid of the bogging problem and sort the gearing and especially the tires , you'll easily take almost a full second off your 1/8 mile time, my nephew use to race Karts here in Canada fully sponsored and his class of karts easily capable of 125 mph and they were fricking loud and just so cool, good times ahead 👍
You guys are so nuts man don’t think I’ve commented on a video before but keep up the great work I love your videos I watch them every night and I get off work guys for real
Really hope you guys bring this back one day. Maybe a dedicated drag car and get it to that 6 seconds :)
Bringing the ducarti back was music to my ears.
As reference, a car that runs high 6s, or low 7s in the 1/8 mile will typically run 10s in the 1/4. That's freaking fast.
Man this is intense. Love it.
Great episode that kart is a beast ,just wondering if you might be getting some bad belt slip as it gets hotter ,but 95 mph though it flys like Concorde 👍👍
Can’t wait for a part two 🔥🔥
I'm stoked for the upcoming content! Great work guys!
Man I wanna see the old drag rail with a big nasty 2stroke on it. That thing would fly!!
Your low end bog is definitely clutching. Little tighter primary spring and a touch lighter primary weights. Maybe change the secondary helix ramp and spring
For the bogging… raise your needle valve. And adjust your air mix screw 1 1/2 turns out.
That over head shot at the end.... that's what happens to your vision when you cut across a corn field with not enough snow in it! Good job guys, factory speed on a sled like that is 120+ so I'm not sure which way you want to go with the gearing.
That was frickin awesome guys
100% know that track. Definitely should have a meet up their.
You get this rocket dialed in, I bet you'll hit low 6s. Looking forward to seeing the Dukarti. I imagine the plugs are fouled from bogging.
Awesome!! Love me some 2 stroke.
Uncork that pipe tune it, & put in some high octane with Amsoil Interceptor mix. Bet you’ll get in the 6’s. Good work boyz!!
Loving seeing a mixture of racetrack and drag strip as well as the usual C&C GP stuff. Can't wait to see what it can do once the issues are ironed out!
Hey guys I want to tell you about the primary clutch on that engine if you look closely you will see 3 bolts with nuts on them 10mm. Look at the head of the bolt you will see a line on the bolt and numbers 1 to 6 in a circle casted right in the clutch. Now loosening that bolt and turning that bolt higher in number will make the rpm on the engine go higher. Should be around 8100 to 8200 rpm. Not getting to that rpm will be a significant lose in power.
Great Job guys you got a ripper.
I love it..."i'm done...I'm done..." LOL that is awesome though!
try a boosted launch by loading up the rpm's and putting your foot on the brake right below the engagement point, with the addition of a heavier spring for more inital hp
Now we're talking! Time to swap and install it on the drag rail
I have a tip, in the burn out box pull forward until your front tires are on dry ground and spin the tires all the way out of the water and onto the dry track or just drive around the water and stage. Replace the fuel tank and run a larger fuel supply to each carb including larger fuel filters, one for each carb. You might even need to pressurize your fuel tank. I drag raced a Kawasaki H2 for years and 2-strokes don't like heat and run best cold.
Loving the drag racing